The Constitution requires the President provide the Congress with information on the State of the Union (Article 2, section 3), but does not state when and where. Doing so in front of the entire Congress in the House chamber is traditional but not obligatory. Moreover, for him to do so in the House chamber can only be done so with an invite from the Speaker of the House, Nancy Pelosi, who has indicated no such invitation will be forthcoming.
So now the President has several options: deliver it in the Senate chamber; or from the Oval Office; or (my favorite) hold a rally in Trump friendly Texas and do it there; or some another venue. Right now choice 1 seems to be most likely, but there are alternatives.
ZitatSome House Republicans call for moving State of the Union to Senate chamber after Speaker Nancy Pelosi (D-Calif.) suggested it be rescheduled due to the government shutdown.
Rep. Mo Brooks (R-Ala.) is circulating a letter asking Senate Majority Leader Mitch McConnell (R-Ky.) and Vice President Pence to consider moving the speech across the Capitol. He also suggested that House Democrats should get low-priority seating.
"[S]pace limitations may restrict the number of Congressmen who may attend. Inasmuch as House Democrats are responsible for the State of the Union not being timely held in the House chamber, I recommend that House Democrats be at the bottom of the priority list for attendance inasmuch as they are responsible for the lack of adequate space in the first instance," Brooks wrote in the letter.
Ten other lawmakers have signed on to the letter so far, as of midday Thursday, according to a spokesman.